A plane sinusoidal electromagnetic wave in air has a wavelength of 3.90cm and an E field amplitude of 1.40V/m .
a) What is the frequency of the wave?
b) What is the magnetic field amplitude?
c) What is the intensity?
d) What average force does this radiation exert perpendicular to its direction of propagation on a totally absorbing surface with area 0.246m2 ?